High-speed steel grinding type drill bit

Abstract

The utility model discloses a high-speed steel grinding type drill bit which comprises a drill bit body, a drill bit handle portion is integrally arranged at the tail end of the drill bit body, a flat tail is integrally arranged at the end, away from the drill bit body, of the drill bit handle portion, a rotating portion is arranged at the end, away from the drill bit handle portion, of the drill bit body, and external threads are arranged on the rotating portion. The diameter of the rotating part is smaller than that of the drill bit main body, a spiral groove is formed in the drill bit main body, the rotating part is composed of a plurality of coaxially-arranged screw-in pins, all the screw-in pins are integrally formed, and the diameter from the screw-in pin at the tail end to the screw-in pin integrally formed with the drill bit main body is gradually increased in sequence. The screw-in part is arranged at the tail end of the drill bit body, the tip end is arranged at the tail end of the screw-in part, so that a self-tapping screw is formed between the tip end and the rotating pin, a hole is easily drilled through the rotating pin with the small diameter, then the drill bit body drills along the through hole more easily, and more labor is saved when the drill bit is used for drilling.

Description

Technical Field

[0001] The utility model relates to the technical field of drill bits, in particular to a high-speed steel grinding drill bit. Background Art

[0002] Drills are tools used to drill through holes or blind holes in solid materials, and can also expand existing holes. Common drills include twist drills, flat drills, center drills, deep hole drills, and trepanning drills.

[0003] When a worker uses an electric drill with a drill bit installed to drill a hole, the worker needs to apply force to squeeze the electric drill toward the workpiece to be drilled, which makes drilling very strenuous. Moreover, when the workpiece to be drilled is hard, drilling will be even more strenuous and difficult. Utility Model Content

[0004] In view of the problems existing in the existing high-speed steel grinding drill bit, the present utility model is proposed.

[0005] Therefore, the purpose of the present invention is to provide a high-speed steel grinding drill bit, which solves the problem that when a worker uses an electric drill equipped with a drill bit to drill a hole, the worker needs to exert force to squeeze the electric drill toward the workpiece to be drilled, which makes drilling very strenuous; and when the hardness of the workpiece to be drilled is relatively large, drilling will be even more strenuous and difficult to drill.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A high-speed steel grinding drill bit includes a drill bit body, the end of the drill bit body is integrally provided with a drill bit shank, the end of the drill bit shank away from the drill bit body is integrally provided with a flat tail, the end of the drill bit body away from the drill bit shank is provided with a rotating part, the rotating part has an external thread, and the diameter of the rotating part is smaller than the diameter of the drill bit body.

[0008] As a preferred solution of the high-speed steel grinding drill bit described in the utility model, the drill bit body is provided with a spiral groove.

[0009] As a preferred solution of the high-speed steel grinding drill bit described in the utility model, the rotating part is composed of a plurality of coaxially arranged screw-in pins, each screw-in pin is integrally formed, and the diameters of the end screw-in pin to the screw-in pin integrally formed with the drill bit body increase successively.

[0010] As a preferred solution of the high-speed steel grinding drill bit described in the utility model, wherein: the rotating part is configured as a first screw-in pin integrally formed with the drill bit body, and the outer wall of the first screw-in pin has an external thread;

[0011] The first screw-in pin has a first tip portion at one end away from the drill body, and an outer wall of the first tip portion has an external thread.

[0012] As a preferred solution of the high-speed steel grinding drill bit described in the utility model, wherein: the first screw-in pin and the first tip portion are both provided with a first through hole.

[0013] As a preferred embodiment of the high-speed steel grinding drill bit of the present invention, the rotating portion further comprises a second screw-in pin, the outer wall of the second screw-in pin having an external thread, the second screw-in pin being integrally formed with the first screw-in pin, and the diameter of the second screw-in pin being smaller than the diameter of the first screw-in pin;

[0014] The second screw-in pin has a second tip portion at one end away from the first screw-in pin, and an outer wall of the second tip portion has an external thread.

[0015] As a preferred solution of the high-speed steel grinding drill bit described in the utility model, the second tip portion and the second screw-in pin are jointly provided with a second through hole, and the first screw-in pin is jointly provided with a third through hole.

[0016] Compared with existing technologies:

[0017] By arranging a screw-in portion at the end of the drill bit body, the end of the screw-in portion has a tip, so that a "self-tapping screw" is formed between the tip and the rotating pin, a hole can be easily drilled using a rotating pin with a smaller diameter, and then the drill bit body can be drilled along the through hole more easily, so drilling with this drill bit is more labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of Example 1 of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure provided in Example 2 of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure provided in Example 3 of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure provided in Example 4 of the present utility model;

[0022] Figure 5 Provided for Example 4 of the present utility model Figure 4 Enlarged view of point A in the middle.

[0023] In the figure: drill body 1, drill shank 2, flat tail 3, first screw-in pin 4, third through hole 41, first tip 5, first through hole 51, second screw-in pin 6, second tip 7, second through hole 71. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Example 1

[0025] This utility model provides a high-speed steel grinding drill bit, please refer to Figure 1 , including a drill body 1, which has a spiral groove. The drill body 1 can be any existing high-speed steel grinding drill bit. The end of the drill body 1 is integrally provided with a drill shank 2, and the end of the drill shank 2 away from the drill body 1 is integrally provided with a flat tail 3. The end of the drill body 1 away from the drill shank 2 is provided with a rotating part, which has an external thread, and the diameter of the rotating part is smaller than the diameter of the drill body 1; the rotating part constitutes a "screw", and the diameter is smaller than that of the drill body 1, so it is easier to drill.

[0026] The rotating part is composed of a plurality of coaxially arranged screw-in pins, and each screw-in pin is integrally formed with each other. The diameters of the end screw-in pin to the screw-in pin integrally formed with the drill bit body 1 increase successively. Therefore, a thinner screw-in pin is used for drilling first, and then a thicker screw-in pin is used for drilling, gradually drilling a through hole with the same diameter as the drill bit body 1.

[0027] The rotating part is configured as a first screw-in pin 4 integrally formed with the drill body 1, and the outer wall of the first screw-in pin 4 has an external thread;

[0028] The first screw-in pin 4 has a first tip portion 5 at one end away from the drill bit body 1, and the outer wall of the first tip portion 5 has an external thread; with the support of the first tip portion 5, the first screw-in pin 4 and the first tip portion 5 together constitute a "self-tapping screw", thereby making the drilling operation more labor-saving.

[0029] In actual use, the first screw-in pin 4 and the first tip portion 5 together form a "self-tapping screw", making the drilling operation more labor-saving;

[0030] A through hole with a smaller diameter is first self-drilled, and then the drill body 1 is drilled along the through hole, so drilling is more labor-saving. Example 2

[0031] Refer to the attached Figure 2 , which is different from Example 1: a first through hole 51 is commonly provided on the first screw-in pin 4 and the first tip portion 5, and the first through hole 51 passes through the first screw-in pin 4. At this time, the first through hole 51 can be more labor-saving; the first through hole 51 can effectively dissipate heat for the first screw-in pin 4 and the first tip portion.

[0032] In actual use, the first screw-in pin 4 and the first tip portion 5 together form a "self-tapping screw", making the drilling operation more labor-saving;

[0033] A through hole with a smaller diameter is first self-drilled, and then the drill body 1 is drilled along the through hole, so drilling is more labor-saving. Example 3

[0034] Refer to the attached Figure 3 , which is different from Example 1 in that: the rotating portion further includes a second screw-in pin 6, the outer wall of the second screw-in pin 6 has an external thread, the second screw-in pin 6 is integrally formed with the first screw-in pin 4, and the diameter of the second screw-in pin 6 is smaller than the diameter of the first screw-in pin 4;

[0035] The second screw-in pin 6 has a second tip portion 7 at one end away from the first screw-in pin 4 , and an outer wall of the second tip portion 7 has an external thread.

[0036] In actual use, the second screw-in pin 6 and the first screw-in pin 4 together form a "self-tapping screw", making the drilling operation more labor-saving;

[0037] First, a through hole with a smaller diameter is self-drilled, and then the first screw-in pin 4 expands the diameter along the through hole, and then the drill body 1 drills along the through hole, so drilling will be more labor-saving. Example 4

[0038] Refer to the attached Figure 4-5 , which is different from Example 1 in that: the second tip portion 7 and the second screw-in pin 6 are both provided with a second through hole 71 , and the first screw-in pin 4 is both provided with a third through hole 41 .

[0039] In actual use, the second screw-in pin 6 and the first screw-in pin 4 together form a "self-tapping screw", making the drilling operation more labor-saving;

[0040] First, a through hole with a smaller diameter is self-drilled, and then the first screw-in pin 4 expands the diameter along the through hole, and then the drill body 1 drills along the through hole, so drilling will be more labor-saving.

[0041] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A high-speed steel grinding drill bit, comprising a drill bit body (1), the end of the drill bit body (1) is integrally provided with a drill bit shank (2), and the end of the drill bit shank (2) away from the drill bit body (1) is integrally provided with a flat tail (3), characterized in that: The drill body (1) has a rotating portion at one end away from the drill shank (2), the rotating portion has an external thread, and the diameter of the rotating portion is smaller than the diameter of the drill body (1).

2. A high speed steel grinding drill according to claim 1, characterized in that: The drill bit body (1) is provided with a spiral groove.

3. A high speed steel grinding drill according to claim 2, characterized in that: The rotating part is composed of a plurality of coaxially arranged screw-in pins, each screw-in pin is integrally formed, and the diameters of the screw-in pin from the end to the screw-in pin integrally formed with the drill body (1) increase in sequence.

4. A high speed steel grinding drill according to claim 3, characterized in that: The rotating portion is provided as a first screw-in pin (4) integrally formed with the drill body (1), and the outer wall of the first screw-in pin (4) is provided with an external thread.

5. A high speed steel grinding drill according to claim 4, characterized in that: The first screw-in pin (4) has a first tip portion (5) at one end away from the drill bit body (1), and an outer wall of the first tip portion (5) has an external thread.

6. A high speed steel grinding drill according to claim 4, characterized in that: The first screw-in pin (4) and the first tip portion (5) are both provided with a first through hole (51).

7. A high speed steel grinding drill according to claim 3, characterized in that: The rotating portion further comprises a second screw-in pin (6), the outer wall of the second screw-in pin (6) having an external thread, the second screw-in pin (6) and the first screw-in pin (4) being integrally formed, and the diameter of the second screw-in pin (6) being smaller than the diameter of the first screw-in pin (4); The second screw-in pin (6) has a second tip portion (7) at one end away from the first screw-in pin (4), and an outer wall of the second tip portion (7) has an external thread.

8. A high speed steel grinding drill according to claim 7, characterized in that: The second tip portion (7) and the second screw-in pin (6) are both provided with a second through hole (71), and the first screw-in pin (4) is both provided with a third through hole (41).

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